1. adapt
  2. ocean
  3. border
  4. climate
  5. coast
  6. degrees
  7. delta
  8. desert
  9. environment
  10. environment concerns/issues
  11. forest
  12. geographic characteristics
  13. grasslands
  14. human/environmental interaction
  15. island
  16. landforms
  17. lake
  18. latitude/longitude
  19. legend/key
  20. migrate/migration/immigration
  21. mountain
  22. natural environment
  23. pampas
  24. physical map
  25. plains
  26. plateau
  27. political map
  28. population density
  29. rainforest
  30. region
  31. resources
  32. river
  33. settlement
  34. technology
  35. transportation
  36. tundra
  37. valley
  38. vegetation
  39. Equator
  40. peninsula